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### Question: What causes Autoimmune hemolytic anemia?
### Response: Possible causes include:
Certain chemicals, drugs, and toxins Infections Transfusion of blood from a donor with a blood type that does not match Certain cancers
When antibodies form against red blood cells for no reason, the condition is called idiopathic autoimmune hemolytic anemia.
The antibodies may also be caused by:
Complication of another disease Past blood transfusions Pregnancy (if the baby's blood type is different from the mother's)
Risk factors are related to the causes.